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Convert a python dict to a string and back
...n the program is run again.
How would I convert a dictionary object into a string that can be written to a file and loaded back into a dictionary object? This will hopefully support dictionaries containing dictionaries.
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Can you get the column names from a SqlDataReader?
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var reader = cmd.ExecuteReader();
var columns = new List<string>();
for(int i=0;i<reader.FieldCount;i++)
{
columns.Add(reader.GetName(i));
}
or
var columns = Enumerable.Range(0, reader.FieldCount).Select(reader.GetName).ToList();
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Why does 2 == [2] in JavaScript?
... when evaluating 2 == [2] is basically this:
2 === Number([2].valueOf().toString())
where valueOf() for arrays returns the array itself and the string-representation of a one-element array is the string representation of the single element.
This also explains the third example as [[[[[[[2]]]]]]]...
Check if a string matches a regex in Bash script
...[[ ]], along with the regular expression match operator, =~, to check if a string matches a regex pattern.
For your specific case, you can write:
[[ $date =~ ^[0-9]{8}$ ]] && echo "yes"
Or more a accurate test:
[[ $date =~ ^[0-9]{4}(0[1-9]|1[0-2])(0[1-9]|[1-2][0-9]|3[0-1])$ ]] && ec...
Can you use reflection to find the name of the currently executing method?
...t 2):
protected void SetProperty<T>(T value, [CallerMemberName] string property = null)
{
this.propertyValues[property] = value;
OnPropertyChanged(property);
}
public string SomeProperty
{
set { SetProperty(value); }
}
The compiler will suppl...
How to extract extension from filename string in Javascript? [duplicate]
...n-capturing group, make it optional
$ # anchor to the end of the string
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How to avoid java.util.ConcurrentModificationException when iterating through and removing elements
... the enhanced for loop.
As an example of the second option, removing any strings with a length greater than 5 from a list:
List<String> list = new ArrayList<String>();
...
for (Iterator<String> iterator = list.iterator(); iterator.hasNext(); ) {
String value = iterator.next(...
Putting HTML inside Html.ActionLink(), plus No Link Text?
...ValueDictionary but you'd have to construct it differently.
public static string ActionLinkSpan( this HtmlHelper helper, string linkText, string actionName, string controllerName, object htmlAttributes )
{
TagBuilder spanBuilder = new TagBuilder( "span" );
spanBuilder.InnerHtml = linkText;
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The type 'string' must be a non-nullable type in order to use it as parameter T in the generic type
Why do I get Error "The type 'string' must be a non-nullable value type in order to use it as parameter 'T' in the generic type or method 'System.Nullable'"?
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Safe integer parsing in Ruby
I have a string, say '123' , and I want to convert it to the integer 123 .
8 Answers
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